i slow... i think any of the methods above would work. i also think with a piece that small if you place it somewhere in youre tank without securing it down first, the flow may carry it away. i would suggest a rubber band slightly to one side of the foot , cut the tree as close to the rock as possible. and if you dont get the whole foot off another one will grow off the tiniest piece left. after a day or two it should start to attach itself, doesnt take long, gl